The Frozen Four — college hockey’s version of the Final Four — comes to Philadelphia on Thursday and features three of the top four seeds from the regional rounds. Only Wisconsin was left behind, upset by a North Dakota team that made it all the way after another surprising win against Ferris State.

The semifinals take place Thursday and are nationally televised on ESPN2 starting at 5 p.m. The championship game follows in primetime on Saturday night on ESPN at 7:30.

(3) Union vs. (2) Boston College, 5 p.m.

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UNION (30-6-4): The Dutchmen went from not making an NCAA Tournament until 2011 to now being in their second Frozen Four in the past three years.

After Keith Kinkaid and Troy Grosenick both left early to join the Devils and Sharks organizations during the past few years, Union is now backstopped by junior Colin Stevens, who earned two victories in the Bridgeport regionals but showed he was very rebound prone.

But the name to watch for the Dutchmen remains Hobey Baker finalist Shayne Gostisbehere, a junior defenseman drafted by the Flyers in the third round in 2012. Speculation remains that Gostisbehere could forgo his senior season and join the Flyers organization once the tournament is over.

“I’ve never been to a game here,” Gostisbehere told reporters at Wednesday’s press conferences. “During development camp we came here and had a tour of the locker room and stuff. Nothing too big.

But I did have a Geno’s cheese steak last night, so that was pretty good. Other than that, I haven’t seen Philly too much. I came here for a tournament when I was, I think, 9 years old, but I don’t remember it that much. But it’s definitely been nice.”

BOSTON COLLEGE (28-7-4): The Eagles were arguably the early favorites to win it all at the Frozen Four until a shocking first-round defeat at the hands of Notre Dame in the Hockey East Tournament.

But a blowout win against Denver and a hard-fought victory against UMass-Lowell in the Worcester Regional Finals earned them a berth in Philly, and they could win the title once again. After all, it is an even year, and he Eagles took home the hardware in 2008, 2010 and 2012.

While littered with NHL draft picks, some attention will fall to freshman goaltender Thatcher Demko, who is expected to be picked in the first round when the draft takes place in June in the very same building.

Everyone will be talking about Hobey Baker favorite Johnny Gaudreau, a Carney’s Point native. Gaudreau tallied 77 points in 39 games this year, and many feel the undersized forward is ready to join the Calgary Flames, who picked him in 2011.

“We’re excited to be back to the Frozen Four and back here to Philly,” Gaudreau said. “Like Coach (Jerry York) and (linemate) Bill (Arnold) said, our goal all year was to get to Philly, and we’re here now and our next goal is to win a National Championship. All the guys are excited that we’re here and we’re ready to go.”

(1) Minnesota vs. North Dakota, 8:30 p.m.

MINNESOTA (27-6-6): Minnesota was one of the top teams all season long and earned the top seed with an impressive run from the beginning of the season until the end.

It wasbarely tested once the tournament started, easily handling Robert Morris and shutting out St. Cloud State, 4-0, in the regional finals.

Adam Wilcox, drafted by the Tampa Bay Lightning, has been the Golden Gophers’ rock between the pipes and was named one of five finalists for the Mike Richter Award as college hockey’s top goaltender.

He posted a 1.89 GAA and .934 save percentage in 36 games and was helped by a defensive core that includes highly touted Rangers draft pick Brady Skjei.

NORTH DAKOTA (25-13-3): If there is a Cinderella in the tournament, it’s North Dakota. Despite its track record as a college hockey superpower, it was unclear if it would even make the tournament at all until the last day of the season.

North Dakota, which last won the title in 2000, has received solid goaltending from Zane Gothberg and balanced scoring, led by Florida Panthers draft pick Rocco Grimaldi. Its dramatic 2-1 double-overtime win against Ferris State to advance to Philly was arguably the most dramatic contest of the tournament, and there may yet be some magic left in its sticks.

“I don’t know if (being underdogs) really changed our mindset whatsoever,” head coach Dave Hakstol said. “Maybe it reduces some of the outside chatter, but to be honest with you, I don’t know if it has had an effect on our team one way or the other. The guys in the locker room have a lot of faith of the guys that are beside them.”